Sorry you’re having problems. I have a P2000 but haven’t experienced a problem like yours. I don’t know much but I do know the hammer spring ( I guess that’s the correct term for the spring) inside the back strap area slips out and you have to be careful to reinstall it correctly . I have missed it on occasion and had to take the back strap off again to double check the spring. This may have nothing at all to do with your problem . I’m just trying to help.